JP2006220172A - Aluminum fitting combined vibration absorber and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost aluminum fitting combined vibration absorber which is lighter but highly strong and rigid and sufficiently adaptable to layout requirements. <P>SOLUTION: An aluminum alloy extruded section B is cut in inclination to the direction of its extrusion to form two inclined brackets 2, 2. Rubber bushes 3, 4 are fitted into round holes 21, 22 formed in both ends of the inclined brackets 2, 2, respectively. They are combined therewith to form a torque rod 1 as the aluminum fitting combined vibration absorber. Two inclined brackets 2, 2 can be used which are different in inclined condition, and a bracket 6 can be used together with the inclined brackets 2, which is formed by cutting the section B in a plane perpendicular to the direction of its extrusion. Bending work can be applied to the bracket 2 after cut out of the section B, and the cutting direction of the section B to be in a bent shape can be changed on the way. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a composite vibration isolator comprising a combination of a metal fitting and an anti-vibration bush, and particularly to the technical field of the structure and manufacturing method of the vibration isolator when an aluminum alloy metal fitting is used.

  2. Description of the Related Art Conventionally, for example, engine mounts and suspension arms of automobiles are generally structured such that a vibration isolating bush is assembled to a metal bracket. For example, in the engine mount described in Patent Document 1, after the outer cylinder of the cylindrical vibration-proof bushing is press-fitted into the opening of the steel plate bracket, the terminal part of the outer cylinder is folded back to caulk the peripheral edge of the opening of the bracket. I am doing so.

  Further, in the mount bush of Patent Document 2, when press-molding a bracket made of a metal plate, a flange is formed by burring the peripheral edge of the opening provided in the bracket, and the outer cylinder of the vibration isolating bush is attached to the flange. It fits together.

On the other hand, Patent Documents 3 to 6 and the like describe suspension arms in which vibration-proof bushes are arranged at both ends of an arm made of an aluminum alloy for weight reduction. These are arm members each having a hole into which an anti-vibration bushing is inserted by cutting an aluminum alloy shape member formed with a hollow portion extending in the extrusion direction along a plane perpendicular to the extrusion direction. (Hardware) is obtained.
Japanese Patent Laid-Open No. 06-264967 Japanese Patent Laid-Open No. 11-182602 JP 11-347754 A JP 10-034235 A Japanese Patent Laid-Open No. 11-101286 US Pat. No. 6,619,533

  However, in the case of using a bracket made of a metal plate as in the former conventional example (Patent Documents 1 and 2), the contact area between the peripheral edge of the opening of the bracket and the outer cylinder of the vibration-proof bushing tends to be small. There is a problem that it is difficult to ensure strength.

  In this respect, in Patent Document 2, a flange is formed at the peripheral edge of the opening to increase the contact area with the outer cylinder of the vibration isolating bush. The contact area does not become so large.

  On the other hand, in the case of a metal fitting cut out from an extruded shape as in the latter conventional example (Patent Documents 3 to 6), a contact area corresponding to the thickness can be obtained. In this case, the metal fittings are likely to be heavy, and it is difficult to meet the layout requirements.

  That is, in the case where the metal fitting is cut out from the extruded shape as in the above-described conventional example, it is difficult to provide a free thickness as in the case of casting, so that it tends to be heavy. In addition, since the profile is cut at a plane orthogonal to the extrusion direction, the longitudinal direction of the metal fitting is limited to the direction orthogonal to the axis of the vibration isolating bush, and the degree of freedom of the shape is reduced. This makes it difficult to meet the layout requirements.

  In the former conventional example, it is conceivable to perform welding in order to increase the joint strength between the bracket and the vibration-proof bushing. In the latter conventional example, the metal fitting may be cut to reduce the weight. It is possible to think of them, but these are not realistic measures because they all lead to significant cost increases.

  The present invention has been made in view of such various points, and the object of the present invention is to devise the structure of the metal fitting and particularly to the manufacturing method of the composite vibration isolator, and to have strength and rigidity while being lightweight. The object of the present invention is to obtain a composite anti-vibration body that is high and sufficiently capable of meeting layout requirements at low cost.

  In order to achieve the above-mentioned object, in the present invention, an extruded shape made of aluminum alloy is cut obliquely with respect to the extrusion direction to form a bracket extending obliquely with respect to the axis of the fitting hole of the bush. A composite vibration isolator was constructed by connecting at least two brackets including diagonal brackets using an anti-vibration bush.

  Specifically, in the first aspect of the invention, for an aluminum metal composite vibration isolator formed by inserting a vibration isolating bush with an outer cylinder into a hole formed in the aluminum metal, first, the aluminum metal is extruded. It is assumed that the plurality of brackets are cut out from the profile manufactured by processing, and the plurality of brackets are separated from each other in the thickness direction and are connected to each other by vibration-proof bushes fitted in the holes. At least one of the plurality of brackets is an oblique bracket formed by cutting the shape member obliquely with respect to the extrusion direction.

  With the above configuration, the vibration-proof aluminum fittings are composed of a plurality of brackets that are spaced apart from each other, so even if the individual brackets themselves are difficult to reduce in weight, the aluminum fittings combined with them Overall, it is possible to reduce the weight while ensuring the required strength and rigidity.

  In addition, a bracket can be obtained simply by cutting the extruded profile, and a composite vibration isolator can be constructed simply by connecting a plurality of brackets thus obtained with a vibration isolating bush, and a process such as welding is unnecessary. Manufacturing costs including equipment costs can be reduced.

  Furthermore, since the bracket extending in any direction with respect to the shaft center of the bush insertion hole can be formed simply by changing the cutting direction of the shape member, the degree of freedom of the shape of the vibration isolator is increased. For example, an engine room or a tire house It is possible to sufficiently meet the layout requirements for the vibration isolator in the installation space, etc., and to easily cope with design changes due to changes in the requirements.

  Here, in order to more reliably reduce the manufacturing cost of the composite vibration isolator, it is preferable to cut the profile in a plane inclined with respect to the extrusion direction when forming the oblique bracket. invention).

  In that case, it is preferable that the aluminum fitting is constituted by two oblique brackets having the same inclination angle of the cut surface with respect to the extrusion direction (invention of claim 3). In this way, the bracket can be cut out from a single profile without waste. In order to reduce the weight and cost of the aluminum metal fitting while ensuring the bending rigidity and torsional rigidity of the aluminum metal fitting, the aluminum metal fitting is preferably constituted by two brackets.

  However, depending on the layout requirements, it may be more reasonable to construct the aluminum metal fitting by two oblique brackets having different inclination angles of the cut surface with respect to the extrusion direction. Furthermore, the oblique bracket and the extrusion An aluminum fitting can also be constituted by a bracket obtained by cutting a profile in a plane orthogonal to the extrusion direction.

  In consideration of the problem of electrolytic corrosion, it is preferable that the outer cylinder of the vibration isolating bush is made of an aluminum alloy like the aluminum fitting.

  Further, the flat plate bracket cut out from the shape member as described above may be bent later (invention of claim 4). That is, when the aluminum metal fitting is composed of a plurality of brackets as described above, the strength of each bracket does not need to be so high, so if it is cut out from the shape so that it is relatively thin, bending is relatively easy. Will be able to do. On the other hand, the required strength can be ensured for the entire aluminum hardware combining these brackets. As a result, the bracket can be easily bent so that it is easier to meet the layout requirements.

  In addition to the above-described configuration, the circumferential surface of the hole portion of the bracket into which the vibration isolating bushing is fitted may be formed with irregularities at a substantially constant cycle in the circumferential direction. The fitting strength between the outer cylinder and the bracket can be increased, but in this case, it is preferable that the phase of the unevenness is shifted between the holes where the same vibration isolating bushings are fitted in adjacent brackets. (Invention of claim 5)

  Here, the phase of the unevenness between the holes is shifted because the period of the unevenness formed in each of the two holes is different, or the same period and the mutual positions are in the circumferential direction. In short, it refers to a state in which at least some of the irregularities do not overlap when the two holes are arranged coaxially and viewed along the axis.

  If the phase of the irregularities is out of phase, the two adjacent brackets are held side by side, and even if the vibration isolating bush is press-fitted from one side to the other side, A sufficient strength can be obtained by firmly fitting the tubes into the holes of the two brackets.

  In order to shift the phase of the irregularities between the holes as described above, a plurality of extruded shapes having the same shape and different phases of the irregularities formed on the peripheral surface of the corresponding hole are prepared. What is necessary is just to arrange | position the bracket cut out from a different extruded shape part so that it may adjoin.

  According to another aspect, the present invention is a method for manufacturing an aluminum metal fitting composite vibration isolator as described above. Specifically, first, a plurality of hollow portions manufactured by extrusion processing and extending in the extrusion direction are provided. At least one formed aluminum alloy profile is prepared. And while cutting out the some bracket for comprising the said aluminum metal fitting from the shape material, at least 1 cuts the said shape material diagonally with respect to the extrusion direction, and this cut surface is an extrusion direction. And slanted brackets. Then, a plurality of brackets including the diagonal brackets are arranged so as to be separated from each other in the thickness direction, and the vibration isolating bushings are respectively inserted into the holes, thereby connecting the plurality of brackets to each other to obtain a composite vibration isolator. Constitute.

  According to the above-described method, as described in the first aspect of the present invention, an aluminum-fitting composite vibration isolator that is lightweight but has high strength and rigidity, and that can sufficiently meet layout requirements can be obtained at low cost.

  In particular, when the vibration-proof bushings are respectively inserted into the holes of the brackets, a plurality of brackets are held side by side, and the vibration-proof bushings are press-fitted from one side to the other side, and the one bracket is inserted. What is necessary is just to insert the edge part of the anti-vibration bush which penetrated this hole part in the hole part of said other bracket (invention of Claim 7).

  In this way, a plurality of brackets are arranged side by side so that the holes into which the same vibration isolating bushings are fitted are positioned and held coaxially, and the vibration isolating bushes from one direction with respect to these holes. Therefore, the equipment and the process can be simplified, thereby further reducing the manufacturing cost.

  As described above, according to the aluminum metal fitting composite vibration isolator and the manufacturing method thereof according to the present invention, an aluminum alloy extruded profile is cut obliquely with respect to the extrusion direction to form a bracket, including the diagonal bracket. By connecting at least two brackets with a vibration-isolating bushing, a lightweight and high-strength aluminum metal composite vibration-proof body can be constructed at low cost. In addition, since various oblique brackets can be formed simply by changing the direction of cutting the extruded profile, the degree of freedom of the shape of the aluminum fittings that combine them is increased, and the layout requirements for the vibration isolator are also met. It becomes possible to respond sufficiently and easily.

  Moreover, if the bracket cut out from the shape material is bent later as described above, the degree of freedom of the shape of the aluminum metal fitting is further increased, and it becomes easier to meet the layout requirements. (Invention of Claim 4).

In addition, if unevenness is formed on the peripheral surface of the hole portion of the bracket, it is possible to increase the fitting strength with the outer cylinder of the vibration isolating bush fitted therein, and in that case, the hole into which the same vibration isolating bush is inserted. Even when the anti-vibration bush is press-fitted from one side to two adjacent brackets by shifting the phase of the unevenness between the portions (invention of claim 7), sufficient fitting strength can be obtained (claim 5). Invention).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 shows an embodiment in which an aluminum bracket composite vibration isolator according to the present invention is applied to a torque rod 1 which is a kind of automobile engine mount. The lower end part of the engine and transmission (power plant) mounted in place is connected to a vehicle body side member such as a rear sub-frame to restrict excessive rolling and shaking of the power plant.

  As shown in the figure, the torque rod 1 of this embodiment is a combination of two flat brackets 2, 2 and large and small two cylindrical rubber bushes 3, 4 (elastic bushes). 2 and 2, round holes (holes having a circular cross section) 21 and 22 into which rubber bushes 3 and 4 are respectively inserted are formed in both ends in the longitudinal direction (left and right direction in the drawing) in the thickness direction. At the same time, the through holes 23, 23 (shown only in the figure (b)) for reducing the weight are also formed between the two round holes 21, 22 and have the same shape.

  As will be described in detail later, the bracket 2 is formed by cutting an extruded shape made of an aluminum alloy obliquely with respect to the extrusion direction, and the round holes 21 and 22 and the through holes 23 and 23 are both The bracket 2 extends from the thickness direction of the bracket 2 in the longitudinal direction. In other words, with respect to virtual planes P (hereinafter also referred to as shaft faces) in which the shaft centers X1 and X2 (shown only in FIG. 1 (a)) of the rubber bushes 3 and 4 fitted in the round holes 21 and 22 are orthogonal to each other. Thus, it can be said that the bracket 2 extends obliquely (hereinafter also referred to as an oblique bracket).

  The rubber bushes 3 and 4 have inner cylinders 31 and 41 and outer cylinders 32 and 42 connected by rubber elastic bodies 33 and 43, respectively, and elastically support a load acting between them. The inner cylinder 31 of the relatively large diameter rubber bush 3 shown on the left side of the figure is connected to the vehicle body side member, and the inner cylinder 41 of the relatively small diameter rubber bush 4 shown on the right side of the figure is connected to the power train. .

  More specifically, the large-diameter rubber bush 3 includes an inner cylinder 31 formed by cutting a steel pipe or the like and an outer cylinder 32 formed by cutting a tube made of aluminum alloy, which are substantially coaxial with each other and in the direction of the axis X1. The rubber elastic body 33 (shown only in FIG. (B)) is integrally provided from the outer peripheral surface of the inner cylinder 31 to the inner peripheral surface of the outer cylinder 32.

  The rubber elastic body 33 has a substantially cylindrical shape, and an inner peripheral surface and an outer peripheral surface are vulcanized and bonded to the outer peripheral surface of the inner cylinder 31 and the inner peripheral surface of the outer cylinder 32, respectively. Further, the rubber elastic body 33 penetrates the inner cylinder 31 from both sides in the longitudinal direction of the torque rod 1 in the direction of the axis X1 on both sides of the inner cylinder 31 and has a long cross section in the vertical direction in the figure. Penetrating cavities 33a and 33b (shown only in the figure (b)) are formed.

  Thus, since the through voids 33a and 33b are formed on both sides of the rubber elastic body 33 in the longitudinal direction of the torque rod, the rubber bush 3 becomes soft in the longitudinal direction of the torque rod 1, for example, engine idle The vibration around the roll axis of the power plant that occurs during operation can be absorbed by the relative displacement of the inner cylinder 31 and the outer cylinder 32.

  On the other hand, when the power plant rolls greatly or shakes greatly, such as when the engine is started or suddenly accelerated, the through cavities 33a and 33b of the rubber elastic body 33 are crushed and more inner and outer cylinders 31, By preventing the relative displacement of 32, excessive rolling and shaking of the power plant are restricted. The structure of the small-diameter rubber bush 4 is the same as that of the large-diameter rubber bush, but no through space is provided in the rubber elastic body 43 connecting the inner and outer cylinders 41 and 42.

  In the torque rod 1 shown in FIG. 1, two brackets 2, 2 are arranged parallel to each other in the thickness direction, and through two rubber bushes 3, 4 respectively fitted in round holes 21, 22 at both ends thereof. Are connected to each other. In this way, the aluminum bracket that is the main body of the torque rod 1 is configured by the two brackets 2 and 2 that are separated from each other, so that bending rigidity, torsional rigidity, and the like are ensured as compared with the case where the bracket is configured by a single bracket. It becomes possible to make it lighter.

  When the torque rod 1 is viewed from above as shown in FIG. 1 (a), the longitudinal direction (longitudinal direction of the bracket 2) is inclined with respect to the axial face P of the shaft centers X1 and X2 of the rubber bushes 3 and 4. In addition, the central positions of the two rubber bushings 3 and 4 in the axial direction are shifted from each other. The amount of deviation increases as the angle at which the longitudinal direction of the torque rod 1 inclines with respect to the shaft facing P increases. For example, the connecting position of the torque rod 1 on the powertrain side in the engine room of an automobile is When it is required to shift the two rubber bushes 3 and 4 in the direction of their axial centers X1 and X2 (requirement in layout). The inclination state of the torque rod 1 is determined in accordance with the required deviation amount.

-Manufacturing method of torque rod-
The bracket 2 of the torque rod 1 is cut out from an aluminum alloy shaped material manufactured by extrusion as well known in the art (see, for example, Patent Documents 3 to 6). As described above, the oblique bracket 2 extending obliquely with respect to the shaft face P is obtained by cutting the shape member obliquely with respect to the extrusion direction, instead of cutting at right angles to the extrusion direction as in the prior art.

  That is, first of all, although not shown in the drawings by a conventionally well-known extrusion process, for example, an A6000 series aluminum alloy material is inserted into a container, pressed by a ram, and allowed to flow out of a die hole, thereby forming a profile B (see FIG. 2). Mold. At that time, a hollow portion E extending in the extrusion direction is formed in the profile B by a mandrel facing the die hole.

  Then, as schematically shown in FIG. 2, the profile B is linearly cut in a direction inclined with respect to the extrusion direction. In this way, when cutting the profile B in a plane inclined with respect to the extrusion direction, a so-called circular saw can be used and the operation is easy, so that the manufacturing cost can be easily reduced. If the diagonal brackets 2, 2,... Having the same shape are cut out, the brackets 2, 2,.

  Each of the oblique brackets 2, 2,... Cut out in this way is formed with round holes 21, 22 and through holes 23 corresponding to the hollow portion E formed in the profile B. Since the part E extends in the extrusion direction, the round holes 21 and 22 and the through holes 23 of the bracket 2 cut obliquely as described above are inclined with respect to the thickness direction of the bracket 2 as described above. It becomes. That is, the angle formed between the virtual plane perpendicular to the extrusion direction of the profile B and the cut surface of the diagonal bracket 2 is the same as the angle formed by the longitudinal direction of the diagonal bracket 2 with respect to the axis facing P. As described above, various oblique brackets 2, 2,... With different inclination states can be obtained simply by changing the cutting direction when cutting the profile B.

  When the shape B is extruded, for example, if irregularities are provided on the outer periphery of the mandrel used for forming the hollow portion E corresponding to the round hole 21, the round shape of the bracket 2 is shown as an example in FIG. Unevenness 21a, 21b, 21a, 21b,... Can be periodically formed on the peripheral surface of the hole 21 in the circumferential direction, so that the outer cylinder 32 of the rubber bush 3 fitted into the round hole 21 can be formed. The fitting strength can be increased.

  Next, the rubber bushes 3 and 4 are assembled to the two oblique brackets 2 and 2 cut out as described above. For example, as shown in FIG. 4, first, two brackets 2 and 2 are arranged substantially parallel to the thickness direction, and spacers S, S and S are sandwiched between the two brackets 2 and 2 so as to form a predetermined interval therebetween. The brackets 2 and 2 are positioned so that the round holes 21 and 22 of the brackets 2 and 22 are positioned on the same axis, and are gripped integrally from the outside by a gripping tool (not shown).

  Then, on one side (the upper side in the figure) of the two brackets 2 and 2, the rubber bushes 3 and 4 are arranged so that the axial centers X1 and X2 thereof are the axial centers of the round holes 21 and 22 of the brackets 2 and 2, respectively. It positions so that it may correspond, and it moves to an axial center direction toward the other bracket 2 side (lower side) from there. As a result, the rubber bushes 3 and 4 are first press-fitted into the round holes 21 and 22 of the one bracket 2, respectively, and after passing therethrough, the lower end side in the figure is the round holes 21 and 22 of the other bracket 2. Thus, as shown in FIG. 1A, both end sides in the directions of the axial centers X1 and X2 are fitted into the round holes 21 and 22 of the brackets 2 and 2, respectively.

  In addition, when press-fitting into the round holes 21 and 22 as described above, the end portions of the rubber bushes 3 and 4 are in contact with the peripheral portions of the round holes 21 and 22 at an angle. It is preferable that the peripheral edge of the opening is chamfered with a press or the like so that the press-fitting can be facilitated.

  According to the above assembling method, the two brackets 2 and 2 can be held together and the rubber bushes 3 and 4 can be press-fitted from one side, so that the equipment and the process can be simplified. In this way, the manufacturing cost can be reduced, but the method of assembling is not limited to this. For example, as shown in FIG. The brackets 2 and 2 may be assembled from both ends in the X2 direction.

  In the torque rod 1 manufactured as described above, the inclination state of the oblique bracket 2 (inclination angle with the shaft facing P) is determined by the cutting direction of the extruded profile B as described above, and thereby, the two rubber bushes Since the relative positional relationship between 3 and 4 can be set, the relative positional relationship between the power train side coupling position and the vehicle body side coupling position, that is, the layout requirement can be easily adapted.

  Further, for example, when the same type of power train is mounted on the body of a different automobile, the relative relationship between the power train side and the vehicle body side coupling position changes even though the vibration isolation characteristics required for the torque rod 1 are the same. In some cases, the torque rod 1 according to the present invention also includes the diagonal bracket 2 cut out from the extruded profile B as described above. It can be handled very easily by simply changing the cutting direction.

  Further, by changing the cutting direction of the profile B, various oblique brackets 2, 2,... With different inclination states can be obtained, so that the two brackets 2, 2 having the same shape are arranged in parallel as described above. In addition, it is easy to combine two brackets 2 and 2 having different inclination angles. That is, it is not necessary to shift the two rubber bushes 3 and 4 so much due to the requirements in the layout, and on the other hand, when the sizes of the two rubber bushes 3 and 4 are greatly different from each other to some extent, FIG. The torque rod 1 may be configured as shown in FIG.

  FIG. 6 shows an example in which the connecting position of the power rod side and the vehicle body side of the torque rod 1 is hardly shifted in the vehicle width direction of the automobile, and the inclination angle of the cut surface with respect to the extrusion direction of the profile B is slightly different. Two diagonal brackets 2 and 2 are used. Moreover, FIG. 7 uses the bracket 6 which cut | disconnected the profile B in the plane orthogonal to the extrusion direction with the diagonal bracket 2. FIG.

  By combining the various brackets 2,..., 6 and so on, even if the relative relationship between the power train side and the vehicle body side connection position and the size of the rubber bushes 3 and 4 are changed, the torque is correspondingly changed. The structure of the rod 1 can be optimized to ensure sufficient strength and rigidity.

  Therefore, in this embodiment, the aluminum extruded profile B is cut obliquely with respect to the extrusion direction to form oblique brackets 2, 2,..., And at least two brackets 2 including the oblique brackets 2, 2,. ,...,... Are connected to each other using rubber bushes 3 and 4, so that the torque rod 1 that is lightweight but has high strength and rigidity and that can easily meet layout requirements is low in cost. It is obtained by.

  As shown in FIG. 3, when irregularities 21a, 21b,... Are formed periodically in the circumferential direction on the circumferential surface of the round hole 21, one bracket 2 and 2 held side by side as described above When the rubber bushes 3 and 4 are press-fitted from the side (see FIG. 4), when the rubber bush 3 passes through the round hole 21 of the one bracket 2, the rubber bush is formed by the convex portion 21 b on the circumferential surface of the round hole 21. There is a possibility that the outer peripheral surface of the outer cylinder 32 may be deformed or worn and may not be firmly fitted into the round hole 21 of the other bracket 2 to be subsequently press-fitted.

  Therefore, in such a case, the phases of the irregularities 21a, 21b,... On the peripheral surface of the round hole 21 into which the same rubber bush 3 is inserted in the two brackets 2, 2 are shifted. For that purpose, for example, by rotating the mandrel slowly in synchronization with the extrusion of the profile B, a plurality of ridges are spirally formed on the peripheral surface of the hollow portion E corresponding to the round hole 21. do it. Also, two extruded shapes B having the same shape and having a plurality of ridges with different phases formed on the peripheral surface of the hollow portion E corresponding to the round hole 21 are prepared. You may make it use the brackets 2 and 2 cut out from each.

  If the phases of the concave and convex portions 21a, 21b,... Formed on the peripheral surface of the adjacent round holes 21 and 21 of the two brackets 2 and 2 are shifted from each other, as described above, Even when deformation or wear occurs on the outer peripheral surface of the outer cylinder 32 of the rubber bush 3 when passing through the round hole 21, the deformed or worn portion is the round hole of the other bracket 2 that is subsequently press-fitted. Accordingly, the outer cylinder 32 of the rubber bush 3 can be firmly fitted into the round hole 21 of the other bracket 2.

(Embodiment 2)
FIG. 8 shows a torque rod 10 according to a second embodiment of the present invention. In the second embodiment, the brackets 2 and 2 are cut out straight from the profile B as in the first embodiment, and then The brackets 2 and 2 are bent later. Except for this point, the configuration of the torque rod 10 of the second embodiment is the same as that of the first embodiment. Therefore, the same members are denoted by the same reference numerals and the description thereof is omitted.

  That is, when the main body portion of the torque rod 10 is configured by combining a plurality of brackets 2 and 2 as in the present invention, the combined torque of the individual brackets 2 is not required so much. Since the strength and rigidity of the rod 1 can be ensured, if the bracket 2 is cut out relatively thin from the profile B, it can be bent relatively easily.

  Thus, by combining the brackets 2 and 2 which have been bent, the torque rod 10 of the second embodiment has a very high degree of freedom in shape, and the two rubber bushes 3 and 4 are connected to each other as shown in the figure. Since the axes X1 and X2 can also be arranged so as to be twisted, the layout requirements can be more fully and easily handled than those of the first embodiment.

(Embodiment 3)
FIG. 9 shows a torque rod 11 according to a third embodiment of the present invention. In the second embodiment, the section B is not cut linearly as in the first and second embodiments, but in the middle of cutting. The direction is changed, and the brackets 20 and 20 are bent in the thickness direction. Except for this point, the configuration of the torque rod 11 of the third embodiment is substantially the same as that of the first embodiment. Therefore, corresponding members are denoted by the same reference numerals for the sake of convenience, and description thereof is omitted.

  According to the torque rod 11 of the third embodiment, as shown in the figure, the two brackets 20 and 20 are bent in the thickness direction at the middle part in the longitudinal direction. When an impact force is applied, the brackets 20 and 20 are bent due to the compressive force, and the power train is easily moved. As a result, the absorption of impact energy due to the crushing of the vehicle body side frame and the like is appropriately performed as intended, and safety is improved.

(Other embodiments)
The configuration of the present invention is not limited to those of Embodiments 1 to 3 described above, but includes other various configurations. That is, in the torque rods 1, 10, and 11 according to the above-described embodiments, the two brackets 2, 6, and 20 are all used, but the present invention is not limited thereto, and three or more brackets are used. Also good.

  In each of the above embodiments, the case where the aluminum metal complex vibration isolator according to the present invention is applied to a torque rod has been described, but it can also be applied to other engine mounts, suspension arms, etc. In addition, the number of rubber bushes is not limited to two but may be one or three or more.

  As described above, the aluminum bracket composite vibration isolator according to the present invention is lightweight and has high strength and rigidity, can sufficiently and easily meet layout requirements, and at low cost. For example, it is suitable for engine mounts and suspension arms of automobiles.

It is (a) top view and (b) perspective view which shows the structure of the torque rod which concerns on Embodiment 1 of this invention. It is a perspective view which shows the process of forming a bracket typically. It is a perspective view of the modification which formed the unevenness | corrugation in the surrounding surface of a round hole. It is explanatory drawing of the assembly | attachment of the rubber bush to a bracket. FIG. 5 is a view corresponding to FIG. 4 showing a modified example of assembly. FIG. 6 is a view corresponding to FIG. 1 of a modified example using two oblique brackets having slightly different inclination states. FIG. 2 is a view corresponding to FIG. 1 of a modified example using a bracket in which a profile is cut along a plane orthogonal to an extrusion direction together with an oblique bracket. It is the FIG. 1 equivalent view which concerns on Embodiment 2 which gave the bending process to the bracket. It is the FIG. 1 equivalent view which concerns on Embodiment 3 which made the bracket the bending shape.

Explanation of symbols

1,10,11 Torque rod (Aluminum bracket composite vibration isolator)
2, 20 Diagonal bracket (aluminum bracket)
21, 22 Round holes (holes into which elastic bushings are inserted)
21a, 21b,... Concave portion and convex portion (unevenness)
23 Through-holes 3, 4 Rubber bush (elastic bush)
31, 41 Inner cylinder 32, 42 Outer cylinder 33, 43 Rubber elastic body 6 Bracket (aluminum fitting)
B Aluminum alloy extruded section E Hollow part

Claims (7)

An aluminum bracket composite vibration isolator formed by inserting a vibration isolating bush with an outer cylinder into a hole formed in the aluminum bracket,
The aluminum metal fitting is composed of a plurality of brackets cut out from a profile produced by extrusion, and the plurality of brackets are arranged apart from each other in the thickness direction and connected by the vibration-proof bushes fitted in the holes, respectively. Has been
At least one of the plurality of brackets is an oblique bracket formed by cutting the shape member obliquely with respect to an extrusion direction thereof. In the aluminum bracket composite vibration isolator according to claim 1,
The slant bracket is obtained by cutting a shape member on a plane inclined with respect to the extrusion direction thereof. In the aluminum metal fittings composite vibration isolator according to claim 2,
The aluminum bracket composite vibration isolator, wherein the aluminum bracket is composed of two oblique brackets having the same inclination angle of the cut surface with respect to the extrusion direction. In the aluminum metal fittings composite vibration isolator according to claim 2 or 3,
Aluminum bracket composite vibration isolator characterized in that the bracket is bent after being cut out from the shape. In the aluminum bracket composite vibration isolator according to claim 1,
Concavities and convexities are formed on the circumferential surface of the hole of the bracket into which the vibration isolating bushing is inserted at a substantially constant period in the circumferential direction,
An aluminum bracket composite vibration isolator characterized in that the phases of the concaves and convexes are shifted between holes in which the same vibration isolating bushings are fitted in adjacent brackets. A method for manufacturing an aluminum metal fitting anti-vibration body, in which a vibration isolating bush with an outer cylinder is fitted into a hole formed in an aluminum metal fitting,
At least one aluminum alloy shape member formed by extrusion and formed with a plurality of hollow portions extending in the extrusion direction;
A plurality of brackets for constituting the aluminum metal fitting are cut out from the shape material, and at least one of them cuts the shape material obliquely with respect to the extrusion direction, and the cut surface is inclined with respect to the extrusion direction. With diagonal brackets
A plurality of brackets including the diagonal brackets are arranged so as to be spaced apart from each other in the thickness direction, and the vibration isolating bushings are respectively inserted into the holes so as to connect the plurality of brackets to each other. A method for manufacturing a vibration isolator. In the manufacturing method of the aluminum metal fittings composite vibration isolator according to claim 6,
Holding a plurality of brackets side by side, press-fitting the vibration-proof bushing from one side to the other side, and the end of the vibration-proof bush passing through the hole of the bracket on the one side A method for manufacturing a composite vibration isolator of an aluminum metal fitting, characterized by being fitted into a hole of a bracket on the side of the metal plate.

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